Research on Inverse Log-polar Transformation Based on Sub-pixel Interpolation
LI Yan-jun · Computer Engineering and Applications Journal · 2006
Log-polar transformation is not only a mathematical description of the retino-cortical mapping of human vision system,but also an important algorithm of space-variant theory.The log-polar coordinates of an image is decimal fraction and the range is quite narrow because of the logarithmic and arctangent function of the transformation.Aiming at solving these problems,the inverse log-polar transformation based on sub-pixel interpolation is presented.The acquired log-polar image of the new algorithm has a few of mosaic phenomenon,meanwhile the image is continuous.